Thomas Jack

Some common synonyms of expert are adept, proficient, skilled, and skillful. While all these words mean "having great knowledge and experience in a trade or profession," expert implies extraordinary proficiency and often connotes knowledge as well as technical skill. expert in the evaluation of wines.

An expert, more generally, is a person with extensive knowledge or ability based on research, experience, or occupation and in a particular area of study. Experts are called in for advice on their respective subject, but they do not always agree on the particulars of a field of study.